Biodigestão anaeróbia e compostagem de dejetos de suínos, com e sem separação de sólidos
Carregando...
Data
2007-12-07
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade Estadual Paulista (Unesp)
Resumo
Avaliar o processo de biodigestão anaeróbia utilizando dejetos de suínos, com separação da fração sólida (CSFS) e sem separação da fração sólida (SSFS), considerando-se diferentes tempos de retenção hidráulica (TRH) e promover a compostagem da fração sólida retida na peneira foram os objetivos deste projeto. O ensaio de biodigestão anaeróbia foi desenvolvido em duas fases: A primeira fase consistiu no abastecimento de biodigestores tubulares semi-contínuos SSFS e CSFS manejados com TRH de 36, 29, 22 e 15 dias. Nesta fase, o material retido na separação da fração sólida foi submetido ao processo de compostagem. Na segunda fase do ensaio de biodigestão anaeróbia foi utilizado como substrato o efluente gerado na primeira fase, com o intuito de avaliar o potencial remanescente de produção de biogás. Durante a compostagem da fração sólida da água residuária de suinocultura, foram avaliada a temperatura, redução de sólidos totais (ST), sólidos voláteis (SV) número mais provável (NMP) de coliformes totais (CT) e fecais (CF) e volume, além da qualidade do composto. Os biodigestores CSFS e com maior TRH apresentaram os maiores potenciais de produção de biogás e metano e consequentemente foram os que tiveram os menores potenciais de produção de gás remanescente. Foram encontrados potenciais de produção de 0,664 e 0,890 m3 metano/kg de SV para SSFS e CSFS respectivamente, com TRH de 15 dias, o que demonstrou uma eficiência de 34% na conversão de matéria orgânica em metano. Entretanto ao avaliar o remanescente as posições se inverteram sendo encontrado potenciais de 0,385 e 0,117 m3 metano/kg de SV respectivamente, para SSFS e CSFS no TRH de 15 dias. A compostagem da fração sólida se mostrou um bom substrato para o processo apresentando uma redução 71 % de ST e 100% para CT e CF.
Evaluate the anaerobic digestion process using swine manure, with and without solid fraction separation (WSFS and WOSFS, respectively), considered different times of hydraulic retention and promoted the solid fraction retained in the sieve composting were objectives this work. The anaerobic digestion experiment was developed in two phases: The first phase consisted of the provisioning semicontinuous biodigestors with swine wastewater, WSFS and WOSFS maintained with 36, 29, 22 and 15 days of hydraulic retention. In this phase, the material retained in the separation of the solid fraction was submitted to composting process. In the second phase of anaerobic digestion was used as substratum the effluent produced in the first phase, aimed evaluate the remainder biogas potential production. During the composting of the solid fraction of swine wastewater, the temperature, reduction of total solids (TS), most probable number (MPN) of total coliforms (TC) and fecal coliforms (FC), volume and compost quality was evaluated. The larger biogas and methane potential production was presented by biodigestors WSFS, in larger HTR, and consequently presented the smallest remaining biogas potentials of production. Was verified methane potential production of 0.664 and 0.890 m³ methane/kg of volatile solids (VS), for WSFS and WOSFS respectively, with 15 days of HTR, demonstrated 34% efficiency in the conversion of organic matter to methane. However when evaluating the remainder methane potential production was observed 0.385 and 0.117 m³ methane/kg of VS for WSFS and WOSFS, with 15 days of HTR. The composting of solid fraction demonstrated is a good substratum for the process presenting a reduction 71% of TS and 100% for TC and FC.
Evaluate the anaerobic digestion process using swine manure, with and without solid fraction separation (WSFS and WOSFS, respectively), considered different times of hydraulic retention and promoted the solid fraction retained in the sieve composting were objectives this work. The anaerobic digestion experiment was developed in two phases: The first phase consisted of the provisioning semicontinuous biodigestors with swine wastewater, WSFS and WOSFS maintained with 36, 29, 22 and 15 days of hydraulic retention. In this phase, the material retained in the separation of the solid fraction was submitted to composting process. In the second phase of anaerobic digestion was used as substratum the effluent produced in the first phase, aimed evaluate the remainder biogas potential production. During the composting of the solid fraction of swine wastewater, the temperature, reduction of total solids (TS), most probable number (MPN) of total coliforms (TC) and fecal coliforms (FC), volume and compost quality was evaluated. The larger biogas and methane potential production was presented by biodigestors WSFS, in larger HTR, and consequently presented the smallest remaining biogas potentials of production. Was verified methane potential production of 0.664 and 0.890 m³ methane/kg of volatile solids (VS), for WSFS and WOSFS respectively, with 15 days of HTR, demonstrated 34% efficiency in the conversion of organic matter to methane. However when evaluating the remainder methane potential production was observed 0.385 and 0.117 m³ methane/kg of VS for WSFS and WOSFS, with 15 days of HTR. The composting of solid fraction demonstrated is a good substratum for the process presenting a reduction 71% of TS and 100% for TC and FC.
Descrição
Palavras-chave
Aguas residuais, Biodigestor, Composto, Metano, Wastewater, Compost, Methane
Como citar
ORRICO JUNIOR, Marco Antonio Previdelli. Biodigestão anaeróbia e compostagem de dejetos de suínos, com e sem separação de sólidos. 2007. xiii, 93 f. Dissertação (mestrado) - Universidade Estadual Paulista, Faculdade de Ciências Agrárias e Veterinárias, 2007.